My question is my last LMP was March 26,2004. Its the 20th today and I have been feeling like im going to start since friday night. My boyfriend came home to visit on April 8th and 9th we had unprotected sex from about 10:30 the eighth till about 4:30a.m. on the ninth. He pulled out everytime. My breast started getting a little sore this morning and I woke up wanting to puke. Could this just be a virus or could I be pregnant???